Fix jp2 and hdr plugin json definition

and add a check that the json files are well-formed

i.e. they have the same number of keys than of mimetypes

.gitlab-ci.yml

@@ -10,3 +10,11 @@ include:
       - /gitlab-templates/android-qt6.yml
       - /gitlab-templates/freebsd-qt6.yml
       - /gitlab-templates/windows-qt6.yml
+
+image_json_validate:
+  stage: validate
+  image: invent-registry.kde.org/sysadmin/ci-images/suse-qt68:latest
+  tags:
+    - Linux
+  script:
+    - find src/imageformats/ -name *.json | xargs -I file bash -c "echo file && jq -e '(.Keys | type == \"array\") and (.MimeTypes | type == \"array\") and (.MimeTypes | length) == (.Keys | length)' file"

src/imageformats/hdr.json

@@ -1,4 +1,4 @@
 {
-    "Keys": [ "hdr" ],
+    "Keys": [ "hdr", "hdr" ],
     "MimeTypes": [ "image/x-hdr", "image/vnd.radiance" ]
 }

src/imageformats/jp2.json

@@ -1,4 +1,4 @@
 {
     "Keys": [ "jp2", "j2k", "jpf" ],
-    "MimeTypes": [ "image/jp2" ]
+    "MimeTypes": [ "image/jp2", "image/x-jp2-codestream", "image/jpx" ]
 }